Boiler efficiencies
Boiler efficiencies
(OP)
Hi,
I would like if anyone has a table with the common range of values for the boiler efficiencies for different fuels: Natural Gas, Propane, Butane, Biomass(wood chips), coal, fueloil.
thank you!
I would like if anyone has a table with the common range of values for the boiler efficiencies for different fuels: Natural Gas, Propane, Butane, Biomass(wood chips), coal, fueloil.
thank you!





RE: Boiler efficiencies
Your best bet is to talk to the boiler manufacturers in your area
RE: Boiler efficiencies
RE: Boiler efficiencies
If the boiler is downstream of a refractory incinerator, much higher radiation loss Lr would be expected , likewise if a refractory based CFB cyclone is used higher rad losses occur- for high efficiencies, aim toward steam cooled or water coolled furnaces and cyclones.
Smaller units have efficiencies all over the lot- can't generalize
RE: Boiler efficiencies
In order to get started and get some numbers coming out, one can always do calculations for an ideal case -- no loss -- and start comparing different fuel types and find out what the mass flow rates are etc. ...
Once the ideal case is taken care of, then rules of thumb can be applied.
In the final run, experimental and operational values for given design conditions need to be taken into consideration and matched with the engineering calculations ...
Thanks,
Gordan
http://engware.i-dentity.com
RE: Boiler efficiencies
rmw
RE: Boiler efficiencies
Overall boiler efficiency, as stated above, is a function both of the type of fuel and the mode of operation. Excess air has a significant affect on efficency.
Natural gas fired boilers can easily operate between 68-88% efficency. As I recall, boilers fired on #2 fuel oil can reach just above 90%
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Although efficency is important in a boiler firing a bio-fuel, operations and maintenance factors such as fouling and material degradation often become much more important in the overall economic evaluation of an installation.
My opinion only
-MJC